CN103063396B - Test method for reliability of polymer battery - Google Patents
Test method for reliability of polymer battery Download PDFInfo
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- CN103063396B CN103063396B CN201210580349.8A CN201210580349A CN103063396B CN 103063396 B CN103063396 B CN 103063396B CN 201210580349 A CN201210580349 A CN 201210580349A CN 103063396 B CN103063396 B CN 103063396B
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Abstract
The invention discloses a test method for reliability of a polymer battery. The test method for reliability of the polymer battery comprises the following steps: (1) measuring and recording an original voltage and an original internal resistance of a to-be-tested polymer battery, (2) arranging the polymer battery on a battery groove which corresponds to a test box in a fixed mode and making insulating treatment to lugs of the polymer battery, wherein a distance is kept between the polymer battery and four inner side edges of a groove, (3) enabling the test box to repeatedly fall from a preset height in a front, back, left, right, top and bottom direction, measuring a voltage and an interval resistance after an internal of a preset number of times, and comparing the voltage and the internal resistance with the original voltage and the original internal resistance. If the voltage and the internal resistance are abnormal, the polymer battery fails the test. The test method for reliability of the polymer battery is used for testing a degree of 'damage' to the internal structure of the polymer battery caused by impact generated from relative movement between a battery pack and an encapsulating shell in the process of falling down, such as partial misplacement of an anode and a cathode, coming off or breaking of welding spots of the lugs and a foil substrate and breaking of an anode lug. The outward manifestation is abnormity of the voltage or the internal resistance.
Description
Technical field
The present invention relates to battery preparation technology field, particularly relate to a kind of method of testing of reliability of polymer battery.
Background technology
Polymer battery is as the novel battery of recent development in lithium battery, and because its Performance Ratio lithium ion battery is more excellent, it is safer to use, and have and can make the advantage such as various sizes, shape by user's requirement, its use is more extensively sent out.The capacity of current battery monomer (battery core) series of products is from 30 to 10000mAh, and thickness is the thinnest can accomplish 0.5mm.Be widely applied to the electronic products such as bluetooth earphone, MP3, MP4, MD, PHS phone, mobile phone, mobile phone, notebook computer.
Also there are some safety problems in polymer battery, such as short circuit, overcharge, leakage etc., and for these safety problems, generally have corresponding safety detecting method, such as short-circuit test, overcharge test, shock-testing, lancing test, On-board test etc.Also there is the certification of some secure contexts, such as UL1642, UL2054, CB certification, CE certification etc. simultaneously.
But, because its feature of polymer battery occupies leading position in the market gradually, especially portable electronic product, market share ratio is more and more higher, in the routine use of electronic product, product continuously low height falls and is difficult to avoid, and also ununified method assesses the impact that this phenomenon causes polymer battery structure at present.So the safety detecting method of Erecting and improving is necessary.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art, and a kind of method of testing of reliability of polymer battery is provided.
The technical scheme adopted for realizing object of the present invention is:
A method of testing for reliability of polymer battery, comprises the following steps,
1) measure and record initial voltage and the initial internal resistance of polymer battery to be tested;
2) polymer battery to be fixedly installed in battery case corresponding to testing cassete and by the lug insulation processing of polymer battery, wherein, described polymer battery and groove four inner side edge keep interval;
3) testing cassete is carried out repeatedly repeating all around, top end six direction from predetermined altitude to fall, after the pre-determined number of interval, measurement carried out to voltage and internal resistance and compare with initial voltage and initial internal resistance, if there is voltage and internal resistance extremely, not by test.
Described predetermined altitude is 75mm.
Fall order to carry out according to the order of the anterior-posterior-left side-the right-Top-Bottom, wherein front-back drop number is 1250 times, the number of times that the left side, the right, top and bottom are fallen is 750 times, often measure for 250 times and record the voltage of one-shot battery and internal resistance and compare with initial voltage and initial internal resistance, if there is voltage or internal resistance in falling process extremely, then represent this battery not by falling safety test.
Described polymer battery and battery case four side have the gap of more than 2mm.
During described electrostrictive polymer tankage <800mAh, the general assembly (TW) of polymer battery and testing cassete is 75-85g; During 800mAh<=electrostrictive polymer tankage <2000mAh, the general assembly (TW) of polymer battery and testing cassete is 145-155g; During 2000mAh<=electrostrictive polymer tankage <5000mAh, the general assembly (TW) of polymer battery and testing cassete is 345-355g.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is by carrying out six direction falling assessment test from low height in the device that battery is fixed on constant weight, the impact that its relative movement be used between test battery pole group and package casing in falling process brings is to " destruction " degree of inside battery structure, this " destruction ", as both positive and negative polarity occur the solder joint of partial transposition, lug and paper tinsel matrix come off or ftracture, the external manifestation such as anode ear fracture is voltage or internal resistance is abnormal.Test simple and reliable, well have evaluated the reliability of polymer battery design, be particularly useful for evaluation and test user under normal circumstances low height lose the damage to battery when putting electronic product, the perfect widely evaluation system of electrostrictive polymer pool structure.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The method of testing of reliability of polymer battery of the present invention, comprises the following steps,
1) measure and record initial voltage and the initial internal resistance of polymer battery to be tested; The battery that general drop test uses is half electricity or full power state.
2) polymer battery to be fixedly installed in battery case corresponding to testing cassete and by the lug insulation processing of polymer battery, wherein, described polymer battery and groove four inner side edge keep more than 2mm interval; Specifically; polymer battery strong double-face adhesive tape is fixed in the testing cassete designed and ensures that the package casing of polymer battery and testing cassete do not have relative movement in falling process; to ensure that two lugs are arranged in detectable position so that in test process measuring voltage and internal resistance simultaneously; for avoiding battery short circuit; described lug need carry out insulation processing, carries out insulation protection process as adopted Kapton Tape.Because the capacity of polymer battery and its electron device used have direct relation, and the weight of suffered impact and this electron device also has relation, preferably, during described electrostrictive polymer tankage <800mAh, the general assembly (TW) of polymer battery and testing cassete is 75-85g; During 800mAh<=electrostrictive polymer tankage <2000mAh, the general assembly (TW) of polymer battery and testing cassete is 145-155g; During 2000mAh<=electrostrictive polymer tankage <5000mAh, the general assembly (TW) of polymer battery and testing cassete is 345-355g.Wherein, the outward appearance of described testing cassete can flexible design match for the electron device for this polymer battery of configuration.
Exemplary illustrated will be carried out below by two polymer batteries, select model be 255661 and 245067 two kinds of flexible packaging polymer batteries, its battery core capacity is respectively 1120mAh and 1045mAh, and its testing cassete (comprising battery) weight is respectively 152g and 148g.In testing cassete, battery pole ear place adopts Kapton Tape to carry out insulation protection process, in case battery short circuit in falling process, and impact evaluation interpretation of result.Table 1 is the Comparative result of two Battery packs of test, and can find out that its data first group is 255661 in falling process, do not occur exception, voltage remains stable, and disassembles battery, no abnormal.And second group in sight 245067 is carried out in end face drop test, in the 250-500 time, there is exception, voltage from 3.86V bust to 0.375V, not by drop test.
Table 1
Interpretation of result.Respectively analysis is disassembled to two Battery packs.255661 inside batteries no abnormal point, and find its internal positive ear in 245067 batteries under tab along fracture, and find that the bottom of this battery exists the gap of nearly 2mm between package casing and battery pole group, in the process of carrying out drop test, due to the repeat impact of package casing and the relative movement of battery pole group, anode ear is aluminium material in addition, quality is soft, this structural design easily causes lug to rupture, and battery structure is destroyed, and voltage or internal resistance performance are extremely.Which illustrate 245067 batteries in structural design, there is larger defect, have ignored the size matching between battery pole group and package casing, if its gap is too small, encapsulation process can cause damage to barrier film, affects battery security; Excesssive gap, falling process can cause pole group structural damage, so in battery structure design, take into full account the factor of this one side, should ensure the security of battery, ensure the reliability of battery structure again.
In sum, drop test well have evaluated the reliability of polymer battery design, the perfect widely evaluation system of electrostrictive polymer pool structure.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a method of testing for reliability of polymer battery, is characterized in that, comprises the following steps,
1) measure and record initial voltage and the initial internal resistance of polymer battery to be tested; The battery used is half electricity or full power state;
2) polymer battery strong double-face adhesive tape to be fixedly installed in battery case corresponding to testing cassete and by the lug insulation processing of polymer battery, to ensure that two lugs are arranged in detectable position so that in test process measuring voltage and internal resistance simultaneously, wherein, described polymer battery and groove four inner side edge keep more than 2mm interval;
3) testing cassete is highly carried out repeatedly repeating all around, top end six direction from 75mm to fall, after the pre-determined number of interval, measurement carried out to voltage and internal resistance and compare with initial voltage and initial internal resistance, if there is voltage and internal resistance extremely, not by test.
2. method of testing as claimed in claim 1, it is characterized in that, fall order to carry out according to the order of the anterior-posterior-left side-the right-Top-Bottom, wherein front-back drop number is 1250 times, the number of times that the left side, the right, top and bottom are fallen is 750 times, often measure for 250 times and record the voltage of one-shot battery and internal resistance and compare with initial voltage and initial internal resistance, if occur in falling process voltage or internal resistance abnormal, then represent this battery not by falling safety test.
3. method of testing as claimed in claim 1 or 2, is characterized in that, during described electrostrictive polymer tankage <800mAh, the general assembly (TW) of polymer battery and testing cassete is 75-85g; During 800mAh<=electrostrictive polymer tankage <2000mAh, the general assembly (TW) of polymer battery and testing cassete is 145-155g; During 2000mAh<=electrostrictive polymer tankage <5000mAh, the general assembly (TW) of polymer battery and testing cassete is 345-355g.
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| CN105866693B (en) * | 2016-04-11 | 2019-03-26 | 深圳市创明新能源股份有限公司 | The choosing method of battery pole ear bond pad locations |
| CN105910645B (en) * | 2016-04-29 | 2018-04-20 | 浙江大学 | A kind of automatic inspection line and its method of 18650 lithium battery |
| CN112525464B (en) * | 2020-11-20 | 2024-02-20 | 汕尾天贸新能源科技有限公司 | Test method for maintaining unchanged surface dyne value of aluminum-plastic film after battery processing |
| CN115235393B (en) * | 2022-07-19 | 2023-04-25 | 河南工学院 | Detection equipment for lithium battery pack and detection method thereof |
| CN115855418A (en) * | 2022-10-31 | 2023-03-28 | 北京沃华慧通测控技术有限公司 | Fall detection equipment and fall detection method |
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| CN2760776Y (en) * | 2004-07-28 | 2006-02-22 | 哈尔滨光宇电源股份有限公司 | Lithium ion secondary battery |
| JP4599314B2 (en) * | 2006-02-22 | 2010-12-15 | 株式会社東芝 | Non-aqueous electrolyte battery, battery pack and automobile |
| KR101040978B1 (en) * | 2007-01-25 | 2011-06-16 | 주식회사 엘지화학 | Drop Test Device of Battery |
| JP4954775B2 (en) * | 2007-04-12 | 2012-06-20 | ソニー株式会社 | Battery pack |
| CN201233305Y (en) * | 2008-06-24 | 2009-05-06 | 比亚迪股份有限公司 | Battery automatic falling test device |
| US8061182B2 (en) * | 2009-06-22 | 2011-11-22 | Research In Motion Limited | Portable electronic device and method of measuring drop impact at the portable electronic device |
| CN202501970U (en) * | 2012-02-06 | 2012-10-24 | 惠州Tcl移动通信有限公司 | Multi-direction adjustable micro fall test machine |
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Effective date of registration: 20230323 Address after: 300000 No.38 Haitai South Road, Huayuan Industrial Zone (outside the ring), High-tech Zone, Binhai New Area, Tianjin Patentee after: Tianjin Juyuan New Energy Technology Co.,Ltd. Address before: 300384 Tianjin Xiqing District Binhai hi tech Industrial Development Zone (outer ring) 38 Haitai South Road Patentee before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |
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